This expertise is in addition to the spend on monitoring technology and the hiring of thousands of compliance workers prompted by controversies such as the $2.3 billion in losses racked up by former UBS trader Kweku Adoboli.
It is a change from the roles former law enforcement workers traditionally filled within financial services, which mainly involved rooting out theft.
There remain questions, however, over whether intelligence professionals have the right skills to identify wrongdoing in finance and whether the climate of fear it creates has a negative impact on employees.
Some bankers reported texting spouses from the toilets, while others have left for the less heavily-regulated hedge fund world, Bloomberg said.
